11520215 has 16 divisors (see below), whose sum is σ = 15856128. Its totient is φ = 7871136.

The previous prime is 11520191. The next prime is 11520227. The reversal of 11520215 is 51202511.

It is not a de Polignac number, because 11520215 - 2¹⁰ = 11519191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11520193 and 11520202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15134 + ... + 15876.

It is an arithmetic number, because the mean of its divisors is an integer number (991008).

Almost surely, 2^11520215 is an apocalyptic number.

11520215 is a deficient number, since it is larger than the sum of its proper divisors (4335913).

11520215 is an equidigital number, since it uses as much as digits as its factorization.

11520215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 11520215 is about 3394.1442220389. The cubic root of 11520215 is about 225.8500519418.

Adding to 11520215 its reverse (51202511), we get a palindrome (62722726).

The spelling of 11520215 in words is "eleven million, five hundred twenty thousand, two hundred fifteen".